Demixing Transition in a Quasi-Two-Dimensional Surface-Frozen Layer

E. Sloutskin; O. Gang; H. Kraack; B. M. Ocko; E. B. Sirota; M. Deutsch

doi:10.1103/physrevlett.89.065501

Demixing Transition in a Quasi-Two-Dimensional Surface-Frozen Layer

E. Sloutskin, O. Gang, H. Kraack, B. M. Ocko, E. B. Sirota, M. Deutsch

Department of Physics - at Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

A thin/thick transition was observed by x-ray reflectivity in a surface-frozen crystalline bilayer on the surface of a molten binary mixture of long alcohols. This rare example of a solid-solid phase transition in a quasi-2D system is shown to result from an abrupt temperature-driven change in the layer’s composition, kinetically enabled by the layer’s ability to exchange molecules with the underlying 3D liquid bulk. Mean-field thermodynamics yields a Gibbs-adsorption-like expression which accounts very well for the transition.

Original language	English
Journal	Physical Review Letters
Volume	89
Issue number	6
DOIs	https://doi.org/10.1103/physrevlett.89.065501
State	Published - 5 Aug 2002

Bibliographical note

Funding Information:
We thank Y. Rabin (Bar-Ilan) for illuminating discussions and suggestions and NSLS for beam time allocation at X22B. BNL is supported by the U.S. DOE under Contract No. DE-AC02-98CH10886.

Funding

We thank Y. Rabin (Bar-Ilan) for illuminating discussions and suggestions and NSLS for beam time allocation at X22B. BNL is supported by the U.S. DOE under Contract No. DE-AC02-98CH10886.

Funders	Funder number
U.S. Department of Energy	DE-AC02-98CH10886

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Demixing Transition in a Quasi-Two-Dimensional Surface-Frozen Layer

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